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- /**
- * Marlin 3D Printer Firmware
- *
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * SAMD51 HAL developed by Giuliano Zaro (AKA GMagician)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- */
- #pragma once
-
- /**
- * Endstop interrupts for ATMEL SAMD51 based targets.
- *
- * On SAMD51, all pins support external interrupt capability.
- * Any pin can be used for external interrupts, but there are some restrictions.
- * At most 16 different external interrupts can be used at one time.
- * Further, you can’t just pick any 16 pins to use. This is because every pin on the SAMD51
- * connects to what is called an EXTINT line, and only one pin per EXTINT line can be used for external
- * interrupts at a time
- */
-
- /**
- * Endstop Interrupts
- *
- * Without endstop interrupts the endstop pins must be polled continually in
- * the temperature-ISR via endstops.update(), most of the time finding no change.
- * With this feature endstops.update() is called only when we know that at
- * least one endstop has changed state, saving valuable CPU cycles.
- *
- * This feature only works when all used endstop pins can generate an 'external interrupt'.
- *
- * Test whether pins issue interrupts on your board by flashing 'pin_interrupt_test.ino'.
- * (Located in Marlin/buildroot/share/pin_interrupt_test/pin_interrupt_test.ino)
- */
-
- #include "../../module/endstops.h"
-
- #define MATCH_EILINE(P1,P2) (P1 != P2 && PIN_TO_EILINE(P1) == PIN_TO_EILINE(P2))
- #if HAS_X_MAX
- #define MATCH_X_MAX_EILINE(P) MATCH_EILINE(P, X_MAX_PIN)
- #else
- #define MATCH_X_MAX_EILINE(P) false
- #endif
- #if HAS_X_MIN
- #define MATCH_X_MIN_EILINE(P) MATCH_EILINE(P, X_MIN_PIN)
- #else
- #define MATCH_X_MIN_EILINE(P) false
- #endif
- #if HAS_Y_MAX
- #define MATCH_Y_MAX_EILINE(P) MATCH_EILINE(P, Y_MAX_PIN)
- #else
- #define MATCH_Y_MAX_EILINE(P) false
- #endif
- #if HAS_Y_MIN
- #define MATCH_Y_MIN_EILINE(P) MATCH_EILINE(P, Y_MIN_PIN)
- #else
- #define MATCH_Y_MIN_EILINE(P) false
- #endif
- #if HAS_Z_MAX
- #define MATCH_Z_MAX_EILINE(P) MATCH_EILINE(P, Z_MAX_PIN)
- #else
- #define MATCH_Z_MAX_EILINE(P) false
- #endif
- #if HAS_Z_MIN
- #define MATCH_Z_MIN_EILINE(P) MATCH_EILINE(P, Z_MIN_PIN)
- #else
- #define MATCH_Z_MIN_EILINE(P) false
- #endif
- #if HAS_Z2_MAX
- #define MATCH_Z2_MAX_EILINE(P) MATCH_EILINE(P, Z2_MAX_PIN)
- #else
- #define MATCH_Z2_MAX_EILINE(P) false
- #endif
- #if HAS_Z2_MIN
- #define MATCH_Z2_MIN_EILINE(P) MATCH_EILINE(P, Z2_MIN_PIN)
- #else
- #define MATCH_Z2_MIN_EILINE(P) false
- #endif
- #if HAS_Z3_MAX
- #define MATCH_Z3_MAX_EILINE(P) MATCH_EILINE(P, Z3_MAX_PIN)
- #else
- #define MATCH_Z3_MAX_EILINE(P) false
- #endif
- #if HAS_Z3_MIN
- #define MATCH_Z3_MIN_EILINE(P) MATCH_EILINE(P, Z3_MIN_PIN)
- #else
- #define MATCH_Z3_MIN_EILINE(P) false
- #endif
- #if HAS_Z4_MAX
- #define MATCH_Z4_MAX_EILINE(P) MATCH_EILINE(P, Z4_MAX_PIN)
- #else
- #define MATCH_Z4_MAX_EILINE(P) false
- #endif
- #if HAS_Z4_MIN
- #define MATCH_Z4_MIN_EILINE(P) MATCH_EILINE(P, Z4_MIN_PIN)
- #else
- #define MATCH_Z4_MIN_EILINE(P) false
- #endif
- #if HAS_Z_MIN_PROBE_PIN
- #define MATCH_Z_MIN_PROBE_EILINE(P) MATCH_EILINE(P, Z_MIN_PROBE_PIN)
- #else
- #define MATCH_Z_MIN_PROBE_EILINE(P) false
- #endif
- #define AVAILABLE_EILINE(P) (PIN_TO_EILINE(P) != -1 \
- && !MATCH_X_MAX_EILINE(P) && !MATCH_X_MIN_EILINE(P) \
- && !MATCH_Y_MAX_EILINE(P) && !MATCH_Y_MIN_EILINE(P) \
- && !MATCH_Z_MAX_EILINE(P) && !MATCH_Z_MIN_EILINE(P) \
- && !MATCH_Z2_MAX_EILINE(P) && !MATCH_Z2_MIN_EILINE(P) \
- && !MATCH_Z3_MAX_EILINE(P) && !MATCH_Z3_MIN_EILINE(P) \
- && !MATCH_Z4_MAX_EILINE(P) && !MATCH_Z4_MIN_EILINE(P) \
- && !MATCH_Z_MIN_PROBE_EILINE(P))
-
- // One ISR for all EXT-Interrupts
- void endstop_ISR() { endstops.update(); }
-
- void setup_endstop_interrupts() {
- #if HAS_X_MAX
- #if !AVAILABLE_EILINE(X_MAX_PIN)
- #error "X_MAX_PIN has no EXTINT line available."
- #endif
- attachInterrupt(X_MAX_PIN, endstop_ISR, CHANGE);
- #endif
- #if HAS_X_MIN
- #if !AVAILABLE_EILINE(X_MIN_PIN)
- #error "X_MIN_PIN has no EXTINT line available."
- #endif
- attachInterrupt(X_MIN_PIN, endstop_ISR, CHANGE);
- #endif
- #if HAS_Y_MAX
- #if !AVAILABLE_EILINE(Y_MAX_PIN)
- #error "Y_MAX_PIN has no EXTINT line available."
- #endif
- attachInterrupt(Y_MAX_PIN, endstop_ISR, CHANGE);
- #endif
- #if HAS_Y_MIN
- #if !AVAILABLE_EILINE(Y_MIN_PIN)
- #error "Y_MIN_PIN has no EXTINT line available."
- #endif
- attachInterrupt(Y_MIN_PIN, endstop_ISR, CHANGE);
- #endif
- #if HAS_Z_MAX
- #if !AVAILABLE_EILINE(Z_MAX_PIN)
- #error "Z_MAX_PIN has no EXTINT line available."
- #endif
- attachInterrupt(Z_MAX_PIN, endstop_ISR, CHANGE);
- #endif
- #if HAS_Z_MIN
- #if !AVAILABLE_EILINE(Z_MIN_PIN)
- #error "Z_MIN_PIN has no EXTINT line available."
- #endif
- attachInterrupt(Z_MIN_PIN, endstop_ISR, CHANGE);
- #endif
- #if HAS_Z2_MAX
- #if !AVAILABLE_EILINE(Z2_MAX_PIN)
- #error "Z2_MAX_PIN has no EXTINT line available."
- #endif
- attachInterrupt(Z2_MAX_PIN, endstop_ISR, CHANGE);
- #endif
- #if HAS_Z2_MIN
- #if !AVAILABLE_EILINE(Z2_MIN_PIN)
- #error "Z2_MIN_PIN has no EXTINT line available."
- #endif
- attachInterrupt(Z2_MIN_PIN, endstop_ISR, CHANGE);
- #endif
- #if HAS_Z3_MAX
- #if !AVAILABLE_EILINE(Z3_MAX_PIN)
- #error "Z3_MAX_PIN has no EXTINT line available."
- #endif
- attachInterrupt(Z3_MAX_PIN, endstop_ISR, CHANGE);
- #endif
- #if HAS_Z3_MIN
- #if !AVAILABLE_EILINE(Z3_MIN_PIN)
- #error "Z3_MIN_PIN has no EXTINT line available."
- #endif
- attachInterrupt(Z3_MIN_PIN, endstop_ISR, CHANGE);
- #endif
- #if HAS_Z4_MAX
- #if !AVAILABLE_EILINE(Z4_MAX_PIN)
- #error "Z4_MAX_PIN has no EXTINT line available."
- #endif
- attachInterrupt(Z4_MAX_PIN, endstop_ISR, CHANGE);
- #endif
- #if HAS_Z4_MIN
- #if !AVAILABLE_EILINE(Z4_MIN_PIN)
- #error "Z4_MIN_PIN has no EXTINT line available."
- #endif
- attachInterrupt(Z4_MIN_PIN, endstop_ISR, CHANGE);
- #endif
- #if HAS_Z_MIN_PROBE_PIN
- #if !AVAILABLE_EILINE(Z_MIN_PROBE_PIN)
- #error "Z_MIN_PROBE_PIN has no EXTINT line available."
- #endif
- attachInterrupt(Z_MIN_PROBE_PIN, endstop_ISR, CHANGE);
- #endif
- }
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